from PIL import Image
ascii_char = list('"$%_&WM#*oahkbdpqwmzo0QLCJUYXzcvunxrjft/\|()1{}[]?+@<>i!;:,\^`.')
def get_char(r,b,g,alpha=256):
    if alpha == 0:
        return ''
    gray = int(0.2126*r + 0.7152 * g + 0.0722 * b)
    unit = 256 / len(ascii_char)
    return ascii_char[gray//unit]
def main():
    im = Image.open('astro.jpg')
    WIDTH , HEIGHT = 100,60
    im = im.resize((WIDTH,HEIGHT))
    txt = ''
    for i in range(HEIGHT):
        for j in range(WIDTH) : 
            txt += get_char(*im.getpixel((j,i)))
        txt += '\n'
    fo = open('pic_char.txt','w')
    fo.write(txt)
    fo.close()
main()
           